Filter device for a fluid, and housing portion and filter element for a filter device

Abstract

The invention relates to a filter device (100) for a fluid, in particular for a liquid fluid, having a housing portion (50) which has at least one inlet (52) for the fluid to be filtered and at least one central outlet (54) for the filtered fluid and which is connected or connectable to a housing cover (56) designed to receive, in its interior, an exchangeable filter element (10), wherein the housing portion (50) has a blocking apparatus (70) which is operatively connected to an actuating apparatus (20) of the filter element (10) when the housing cover (56) is brought together as intended with the housing portion (50), wherein the blocking apparatus (70), in an unblocking position (72), allows the housing cover (56) to be mounted and, in a blocking position (74), stops the housing cover (56) from being mounted. The invention also relates to a housing portion (50) and to a filter element (10) for a filter device (100).

Description

[0001] Filter device for a fluid and housing section and filter element for a filter device

[0002] Technical area

[0003] The invention relates to a filter device for a fluid, in particular for a liquid fluid, as well as a housing section and a filter element for a filter device.

[0004] State of the art

[0005] US2014360929A1 discloses a filter device comprising a filter receptacle having a receiving wall and a circular edge defining an opening for receiving a filter cartridge, and a first locking device coupled to the receiving wall of the filter receptacle. The first locking device comprises a first actuating element movable between a first position and a second position and biased into the first position. At least a portion of the first actuating element protrudes from the container wall in the first position. The first locking device is configured such that, when a filter cartridge is inserted into the filter receptacle, the first actuating element is moved by the filter cartridge from the first position to the second position and is retained by the filter cartridge in the second position.

[0006] Disclosure of the invention

[0007] An object of the invention is to provide an improved filter device for a fluid, in particular for a liquid fluid.

[0008] A further object of the invention is to provide a housing section for such a filter device.

[0009] A further object of the invention is to provide a filter element for such a filter device. The aforementioned object is achieved according to one aspect of the invention with a filter device for a fluid, in particular for a liquid fluid, having a housing section which has at least one inlet for the fluid to be filtered and at least one central outlet for the filtered fluid, and which is connected or connectable to a housing cover which is designed to receive a replaceable filter element in its interior, wherein the housing section has a locking device which is operatively connected to an actuating device of the filter element when the housing cover is brought together with the housing section as intended, wherein the locking device enables assembly of the housing cover in a release position and blocks assembly of the housing cover in a lock position.

[0010] According to a further aspect of the invention, the further object is achieved by a housing section for a filter device, with at least one inlet for a fluid to be filtered and at least one central outlet for the filtered fluid, at least comprising a locking device which is operatively connected to an actuating device of a filter element when a housing cover is brought together with the housing section as intended, wherein the locking device releases an assembly of the housing cover in a release position and blocks the assembly of the housing cover in a lock position.

[0011] According to a further aspect of the invention, the further object is achieved by a filter element for a filter device, which is designed to be received in an interior of a housing cover of the filter device, wherein the housing cover with the filter element can be mounted on a housing section, at least comprising an actuating device which, when the housing cover is brought together with the housing section as intended, is in operative connection with a locking device arranged in the housing section.

[0012] Favorable embodiments and advantages of the invention emerge from the further claims, the description and the drawing. According to one aspect of the invention, a filter device for a fluid, in particular for a liquid fluid, is proposed, comprising a housing section which has at least one inlet for the fluid to be filtered and at least one central outlet for the filtered fluid, and which is connected or connectable to a housing cover which is designed to receive a replaceable filter element in its interior. The housing section has a locking device which is operatively connected to an actuating device of the filter element when the housing cover is brought together with the housing section as intended. In a release position, the locking device enables assembly of the housing cover and in a locking position locks assembly of the housing cover.

[0013] The proposed filter device comprises a housing section with an integrated locking device, which can be designed, for example, as a spring-loaded sheet metal structure, and a corresponding actuating device on a filter element. The filter element can, for example, have plastic end plates. The filter device can be designed, for example, for use in oil or fuel filtration or for air deoiling.

[0014] The locking device can, for example, be designed as a flower-like structure and have a locking position and a release position. The transition between the locking position and the release position takes place via guide elements in the housing section against the preload force of the spring-loaded structure. The filter element has a structure arranged on the actuating element according to the key-lock principle in the form of guide receptacles, which corresponds to a structure of guide ribs in the housing section. This enables the filter element to be positioned correctly during installation in the housing section. If no filter element is arranged in the housing cover, or if a filter element with an unsuitable structure is used, the locking device locks the thread and thus prevents assembly of the housing cover. The filter device thus offers a protective function, since the housing cover cannot be installed without the filter element.An additional rib on the housing side, which engages the locking device from the outside radially, prevents the locking device from being activated by using a hollow cylindrical actuating element on a filter element. The locking device can only be activated with an actuating element with suitable guide receptacles as a key structure.

[0015] The locking device can be connected to the housing section in a detachable or non-detachable manner.

[0016] According to a favorable embodiment of the filter device, the locking device can be arranged in the housing section so as to encompass the outlet and can be displaced along a housing axis between the release position and the blocking position. The locking device can be movable by the actuating device into the release position. In particular, the locking device can be in the blocking position when it is not operatively connected to the actuating device. In particular, the locking device can automatically transition from the release position to the blocking position when it is not operatively connected to the actuating device. In this way, the locking device can prevent assembly of the housing cover if the locking device is not moved from the blocking position to the release position by the actuating device of a filter element installed in the housing cover.

[0017] In particular, the locking device can be pushed into the release position along the housing axis when the filter element is positioned in the housing cover during assembly. When not actuated, the locking device automatically returns to the locked position and remains there. For this purpose, the locking device can be advantageously spring-loaded in the locked position.

[0018] According to a favorable embodiment of the filter device, the locking device can have at least two spring arms projecting in the radial direction. In particular, the spring arms can rest against an inner housing wall in the locked position. When not actuated by the actuating device of the filter element, the spring arms can prevent engagement of the thread of the housing cover with a mating thread of the housing section and thus prevent assembly of the housing cover. According to a favorable embodiment of the filter device, the housing section can have axially arranged guide elements by means of which the at least two spring arms are released from the inner housing wall during the transition from the locked position to the release position and are folded inwards in the radial direction.In this way, the spring arms of the locking device can be conveniently folded together so that the thread of the housing cover can engage with the mating thread of the housing section and the housing cover can be mounted on the housing section.

[0019] According to a favorable embodiment of the filter device, the locking device can have at least one spring element, acting in particular along the housing axis, by means of which the locking device can be automatically moved from the release position to the locking position when not operatively connected to the actuating device. The spring element, which can be designed, for example, as a compression spring or leaf spring, can generate the necessary preload to push the locking device back from the release position to the locking position when not actuated.

[0020] According to a favorable embodiment of the filter device, the outlet can have at least one radially projecting guide rib extending along the housing axis, wherein the locking device has at least one corresponding cutout. The locking device can be slidable with the at least one cutout along the guide rib. Thus, the locking device can be reliably guided during movement from the release position to the blocking position and back. The at least one guide rib can advantageously be designed as a key structure for correct mounting of the filter element, which can engage in a corresponding receptacle of the actuating element of the filter element.

[0021] According to a favorable embodiment of the filter device, the actuating device can have guide receptacles that correspond to the guide ribs during proper assembly. The guide ribs can interact with the guide receptacles during proper assembly of the housing cover with the filter element. In particular, the guide ribs can engage in the guide receptacles. The guide ribs can advantageously be designed as a key structure for correct mounting of the filter element, which can engage in corresponding guide receptacles of the actuating element of the filter element.

[0022] According to a favorable embodiment of the filter device, the housing section can have at least one positioning element projecting radially inward and extending along the housing axis, wherein the actuating element of the filter element has at least one recess into which the positioning element engages when the filter element is properly installed. A further rib on the housing side as a positioning element, which engages radially outward into the locking device, can prevent the locking device from being activated by using a hollow cylindrical actuating element on a filter element. The locking device can only be activated with an actuating element with a suitable recess as a key structure.

[0023] According to a favorable embodiment of the filter device, the actuating device can be designed to encompass the outlet when properly installed, with a lower edge of the actuating device displacing the blocking device along the housing axis when properly installed. This ensures a suitable flow of the filtered fluid from the filter element into the outlet and, moreover, a favorable actuation of the blocking device.

[0024] According to a favorable embodiment of the filter device, the actuating device can have a continuously closed contour extending along the housing axis and / or can have webs and / or pins extending along the housing axis. The actuating device can thus be designed in various ways and yet still actuate the locking device in a suitable manner to move it from the locked position to the released position.

[0025] According to a favorable embodiment of the filter device, the actuating device can be formed as part of a central tube and / or as part of an end plate of the filter element. This allows the actuating device to be reliably and permanently connected to the filter element. Furthermore, this allows for cost-effective savings in the manufacture and assembly of the actuating element.

[0026] According to a further aspect of the invention, a housing section for a filter device is proposed, comprising at least one inlet for a fluid to be filtered and at least one central outlet for the filtered fluid. The housing section comprises at least one locking device, which is operatively connected to an actuating device of a filter element when a housing cover is properly joined to the housing section. In a release position, the locking device enables assembly of the housing cover and, in a locking position, prevents assembly of the housing cover.

[0027] The proposed housing section comprises an integrated locking device, which can be designed, for example, as a spring-loaded sheet metal structure. The locking device can be designed, for example, as a flower-like structure and have a locking position and a release position. The transition between the locking position and the release position is achieved via guide elements in the housing section, counteracting the preload force of the spring-loaded structure.

[0028] This allows for the correct positioning of a filter element during installation into the housing section. If no filter element is installed in the housing cover, or if the filter element has an unsuitable structure, the locking device locks the thread, preventing the housing cover from being installed. The filter device with the proposed housing section thus provides a protective function, since the housing cover cannot be installed without the filter element.

[0029] According to a further aspect of the invention, a filter element for a filter device is proposed, which is designed to be received in the interior of a housing cover of the filter device, wherein the housing cover with the filter element can be mounted on a housing section. The filter element comprises at least one actuating device, which is operatively connected to a locking device arranged in the housing section when the housing cover is brought together with the housing section as intended. The filter element has a structure arranged on the actuating element according to the key-lock principle in the form of guide receptacles, which corresponds to a structure of guide ribs in the housing section. This enables the filter element to be positioned correctly during installation in the housing section. If no filter element is arranged in the housing cover, orIf a filter element with an unsuitable structure is used, the locking device blocks the thread, thus preventing the housing cover from being installed. The filter device thus provides a protective function, since the housing cover cannot be installed without the filter element.

[0030] Advantageously, the actuating device can be designed as part of a central tube and / or as part of an end plate of the filter element.

[0031] Short description of the drawings

[0032] Further advantages will become apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0033] Examples include:

[0034] Figure 1 is a side view of a filter device for a fluid, in particular for a liquid fluid, according to an embodiment of the invention with the housing cover unscrewed;

[0035] Figure 2 is a plan view of the housing cover of the filter device according to Figure 1;

[0036] Figure 3 is a sectional view of the filter device in the section plane AA according to

[0037] Figure 1 ;

[0038] Figure 4 shows a further sectional view of the filter device in the section plane D-D according to Figure 2;

[0039] Figure 5 shows a further sectional view of the filter device in the assembled state with the housing cover screwed in, in section plane AA according to Figure 1; Figure 6 shows a further sectional view of the filter device in the assembled state, in section plane DD according to Figure 2;

[0040] Figure 7 shows a further sectional view of the filter device in the assembled state in the section plane EE according to Figure 2;

[0041] Figure 8 is an isometric view of a housing section according to an embodiment of the invention with a locking device in a locking position;

[0042] Figure 9 is an isometric view of the housing section of Figure 8 with the locking device in a release position;

[0043] Figure 10 is a plan view of the housing section according to Figure 8;

[0044] Figure 11 is an isometric view of a filter element according to an embodiment of the invention;

[0045] Figure 12 is an isometric view of a locking device according to an embodiment of the invention;

[0046] Figure 13 is an isometric view of a locking device according to a further embodiment of the invention;

[0047] Figure 14 is an isometric view of a filter element according to a further embodiment of the invention;

[0048] Figure 15 is an isometric view of a filter element according to a further embodiment of the invention; and

[0049] Figure 16 is an isometric view of a filter element according to a further embodiment of the invention.

[0050] Embodiments of the invention

[0051] In the figures, identical or similar components are numbered with the same reference numerals. The figures show only examples and are not to be understood as limiting.

[0052] For the sake of clarity, not all similar elements are provided with reference numerals, but only some of the similar elements are shown by way of example. To explain the invention, Figure 1 shows a side view of a filter device 100 for a fluid, in particular for a liquid fluid, according to an exemplary embodiment of the invention with the housing cover 56 unscrewed. Figure 2 shows a top view of the housing cover 56 of the filter device 100, and Figure 3 shows a sectional view of the filter device 100 in the sectional plane AA of Figure 1. Figure 4 shows another sectional view of the filter device 100 in the sectional plane DD of Figure 2.

[0053] The filter device 100 has a housing section 50, which includes an inlet 52 (visible in Figure 7) for the fluid to be filtered and a central outlet 54 for the filtered fluid. A housing cover 56, which is designed to accommodate a replaceable filter element 10 within its interior, can be connected to the housing section 50 via a screw thread 62, 64. The filter element 10 has, at its upper end, a connecting element 18 that extends at least partially around the housing, for example a locking element, with which the filter element 10 can interact with a counter-element 66 arranged in the housing cover 56 and extends at least partially around the housing cover 56, and is thus fixed in the housing cover 56.

[0054] The installation position of the filter device 100 can be chosen arbitrarily. The filter device 100 can be installed upright, horizontally, or at an angle. When the filter device 100 is installed, the housing cover 56 can be located above the housing section 50, below it, or, when installed horizontally, at the same height, depending on the conditions at the installation location.

[0055] The filter element 10 has a filter medium body 12 mounted on a central tube 40. The filter medium body 12 is closed at both ends by end plates 14, 16, for example, plastic end plates. The fluid to be filtered flows through the filter element 10, as intended, from radially outside to inside. The filtered fluid can be directed outward through the interior of the central tube 40 via the outlet 54. The housing section 50 has a locking device 70, which is operatively connected to an actuating device 20 of the filter element 10 when the housing cover 56 is brought together with the housing section 50 as intended. The locking device 70 enables assembly of the housing cover 56 in a release position 72 and blocks assembly of the housing cover 56 in a lock position 74.

[0056] The locking device 70 encompasses the outlet 54 in the housing section 50 and is displaceable along the housing axis 90 between the release position 72 and the blocking position 74. The locking device 70 can be moved, in particular displaced, into the release position 72 by the actuating device 20 when the filter element 10 is arranged in the housing cover 56 during assembly of the housing cover 56. The locking device 70 is in the blocking position 74 when it is not operatively connected to the actuating device 20. In particular, the locking device 70 can automatically transition from the release position 72 to the blocking position 74 when it is not operatively connected to the actuating device 20 by the spring force of a spring element 78, for example a compression spring 80 (see Figures 3 and 4) or a leaf spring 82 (see Figure 13).

[0057] The locking device 70 is spring-loaded in the locking position 72. For this purpose, the locking device 70 has at least two spring arms 76 projecting radially. The spring arms 76 can advantageously rest against an inner housing wall 58 in the locking position 74.

[0058] In Figures 3 and 4, the locking device 70 is shown in the locking position 74.

[0059] The actuating device 20 encompasses the outlet 54 when properly installed. A lower edge 24 of the actuating device 20 can displace the locking device 70 along the housing axis 90 when properly installed. The actuating device 20 can be configured as part of the central tube 40 of the filter element 10, as shown in the exemplary embodiment in Figures 3 and 4, or as part of the end plate 14 of the filter element 10. The locking device 70 has spring elements 78 acting, in particular, along the housing axis 90, by means of which the locking device 70 automatically jumps from the release position 72 to the locking position 74 when not operatively connected to the actuating device 20. The spring elements 78 can, as shown in the exemplary embodiment, be configured as compression springs 80 arranged around guide domes 79.The locking device 70 can be guided by the guide domes, in particular during the sliding movement from the locking position 74 to the release position 72 and vice versa.

[0060] Figure 5 shows the filter device 100 in the assembled state with the screwed-in housing cover 56 in the sectional plane AA according to Figure 1. Figure 6 shows a further sectional view of the filter device 100 in the assembled state in the sectional plane DD according to Figure 2. Figure 7 shows a further sectional view of the filter device 100 in the assembled state in the sectional plane EE according to Figure 2.

[0061] The housing cover 56 is mounted on the housing section 50 with the filter element 10 inserted. The thread 62 of the housing cover 56 engages the mating thread 64 of the housing section 50. As a result, the locking device 70 is displaced by the lower edge 24 of the locking position 74 into the release position.

[0062] In Figures 5 and 6, the locking device 70 can be seen in the release position 72. The compression spring 80 is compressed by the locking device 70 being pushed downward by the actuating element 20 in Figures 5 and 6.

[0063] In Figure 7, the inlet 52 for the fluid to be filtered is located on a bottom side of the housing section 50, adjacent to the outlet 54. The fluid enters the housing section 50 through the inlet 52 and flows through the filter medium body 12 from radially outside to inside. The filtered fluid is discharged through the interior of the filter medium body 12 to the outlet 54.

[0064] Figure 8 shows an isometric view of the housing section 50 according to an embodiment of the invention with the locking device 70 in the locking position 74, while Figure 9 shows the housing section with the locking device 70 in the release position 72. Figure 10 shows a plan view of an outer side of the housing section 50.

[0065] The housing section 50 has axially arranged guide elements 60, by means of which the spring arms 76 of the locking device 70 are released from the housing inner wall 58 during the transition from the locking position 74 to the release position 72 and are folded inward in the radial direction. When the locking device 70 is pressed downward by the actuating device 20 of the filter element 10 in the housing section 50, the spring arms 76 slide along the guide elements 60 and are thereby forcibly folded inward.

[0066] As can also be seen in Figures 8 and 9, the outlet 54 has a plurality of radially projecting guide ribs 84 extending along the housing axis 90. The locking device 70 has corresponding cutouts 86 (also visible in Figure 12). The locking device 70 can be displaced along the guide rib 84 with the at least one cutout 86.

[0067] As can be seen particularly in Figure 10, the housing section 50 has at least one positioning element 88 projecting radially inward and extending along the housing axis 90. For this purpose, the actuating element 20 of the filter element 10 has at least one recess 32 (see Figure 11) into which the positioning element 88 engages when the filter element 10 is properly installed.

[0068] Figure 11 shows an isometric view of a filter element 10 according to an embodiment of the invention.

[0069] The filter element 10 comprises a filter medium body 12, which is closed at both ends by an end plate 14, 16. As an extension of a non-visible central tube 40 or alternatively of the lower end plate 14, the actuating element 20 protrudes axially at the lower end. In this exemplary embodiment, the actuating element 20 is designed as a contour 26 that is closed in the axial direction 92. The actuating device 20 has guide receptacles 22 formed by its outer contour, which correspond to the guide ribs 84 of the housing section 50 during proper assembly. The guide ribs 84 interact with the guide receptacles 22 during proper assembly of the housing cover 56 with the filter element 10 and, in particular, engage in the guide receptacles 22.Between two guide receptacles 22, a recess 32 is arranged on opposite sides of the actuating device 20, into which the positioning element 88 of the housing section 50 engages when the filter element 10 is mounted as intended.

[0070] Figure 12 shows an isometric view of a locking device 70 according to an embodiment of the invention.

[0071] The locking device 70 can, for example, be designed as a spring-loaded sheet metal structure with a flower-like structure. The petal-like protruding spring arms 76 can rest against the housing inner wall 58 in the locking position 74, as shown in Figure 8. The locking device 70 has a central opening 75, with which it can be displaced on the outlet 54 in the housing direction 90. The cutouts 86, with which the locking device 70 can be displaced on the guide ribs 84 of the housing section 50, extend radially from the central opening 75.

[0072] Opposite each other, guide eyes 77 protrude from the circumference of the locking device 70, by means of which the locking device 70 rests on the compression springs 80 and slides along the guide dome 79 (see Figures 8 and 9).

[0073] Figure 13 shows an isometric view of a locking device 70 according to a further embodiment of the invention.

[0074] Two leaf springs 82 are arranged on each of the guide eyes 77, which, in this alternative embodiment, ensure that the locking device 70 is automatically pressed into the locking position 74. In this embodiment, the compression springs 82 around the guide domes 79 can be omitted. Figures 14 to 16 show filter elements 10 with alternative embodiments of the actuating element 20.

[0075] Figure 14 shows an actuating element 20, which is designed as individual pins 30, which, when properly mounted, press against the locking device 70 on a circumference around the outlet 54 of the housing section 50 and can thereby move the locking device 70 into the release position 72. Guide receptacles 22 in the form of grooves can be arranged on a radially outer contour of the pins 30.

[0076] Figure 15 shows an actuating element 20 which is designed in the form of webs 28, while in Figure 16 an actuating element 20 with a closed contour 26 can be seen.

[0077] In contrast to the embodiments of the actuating element 20 in the form of pins 30 or webs 28, in the embodiment with the closed contour, a recess 32 can advantageously be provided, into which a positioning element 88 arranged in the housing section 50 can engage and thus can guarantee a correct and unmistakable positioning of the filter element 10 in the housing section 50.

[0078] Reference symbol

[0079] 10 filter element

[0080] 12 filter medium bodies

[0081] 14 End plate

[0082] 16 End plate

[0083] 18 Connecting element

[0084] 20 Actuating element

[0085] 22 Lead shot

[0086] 24 lower edge

[0087] 26 closed contour

[0088] 28 jetty

[0089] 30 pin

[0090] 32 recess

[0091] 40 center pipe

[0092] 50 Housing section

[0093] 52 Entrance

[0094] 54 Outlet

[0095] 56 Housing cover

[0096] 58 Housing inner wall

[0097] 60 guide element

[0098] 62 threads

[0099] 64 counter threads

[0100] 66 Counter element

[0101] 70 locking device

[0102] 72 Release position

[0103] 74 Locking position

[0104] 75 central opening

[0105] 76 spring arm

[0106] 77 Guide eyelet

[0107] 78 spring element

[0108] 79 Leadership Dome

[0109] 80 compression spring 82 leaf spring

[0110] 84 Guide rib

[0111] 86 Excerpt

[0112] 88 Positioning element 90 Housing axis

[0113] 92 axial direction

[0114] 100 filter device

Claims

Claims 1. A filter device (100) for a fluid, in particular for a liquid fluid, comprising a housing section (50) which has at least one inlet (52) for the fluid to be filtered and at least one central outlet (54) for the filtered fluid, and which is connected or connectable to a housing cover (56) which is designed to receive a replaceable filter element (10) in its interior, wherein the housing section (50) has a locking device (70) which is operatively connected to an actuating device (20) of the filter element (10) when the housing cover (56) is brought together with the housing section (50) as intended, wherein the locking device (70) enables assembly of the housing cover (56) in a release position (72) and blocks assembly of the housing cover (56) in a lock position (74).

2. Filter device according to claim 1, wherein the locking device (70) in the housing section (50) is arranged so as to encompass the outlet (54) and is displaceable along a housing axis (90) between the release position (72) and the blocking position (74), wherein the locking device (70) is movable from the actuating device (20) into the release position (72), in particular wherein the locking device (70) is in the blocking position (74) when it is not operatively connected to the actuating device (20), in particular wherein the locking device (70) automatically changes from the release position (72) to the blocking position (74) when it is not operatively connected to the actuating device (20).

3. Filter device according to claim 1 or 2, wherein the locking device (70) has at least two spring arms (76) projecting in the radial direction, in particular wherein the spring arms (76) rest against a housing inner wall (58) in the locking position (74).

4. Filter device according to claim 3, wherein the housing section (50) has axially arranged guide elements (60) by means of which the at least two spring arms (76) are released from the housing inner wall (58) during the transition from the blocking position (74) to the release position (72) and are folded inwards in the radial direction.

5. Filter device according to one of the preceding claims, wherein the locking device (70) has at least one spring element (78), acting in particular in the housing axis (90), by means of which the locking device (70) can be automatically brought from the release position (72) into the locking position (74) in the state in which it is not operatively connected to the actuating device (20).

6. Filter device according to one of the preceding claims, wherein the outlet (54) has at least one radially projecting guide rib (84) extending in the housing axis (90), wherein the locking device (70) has at least one corresponding cutout (86), wherein the locking device (70) with the at least one cutout (86) is slidable along the guide rib (84).

7. Filter device according to claim 6, wherein the actuating device (20) has guide receptacles (22) which correspond to the guide ribs (84) when mounted as intended, wherein the guide ribs (84) interact with the guide receptacles (22) when the housing cover (56) is mounted as intended with the filter element (10), in particular wherein the guide ribs (84) engage in the guide receptacles (22).

8. Filter device according to one of the preceding claims, wherein the housing section (50) has at least one positioning element (88) projecting radially inwards and extending in the housing axis (90), wherein the actuating element (20) of the filter element (10) has at least one recess (32) into which the positioning element (88) engages when the filter element (10) is mounted as intended.

9. Filter device according to one of the preceding claims, wherein the actuating device (20) is designed to encompass the outlet (54) when mounted as intended, wherein a lower edge (24) of the actuating device (20) displaces the locking device (70) in the housing axis (90) when mounted as intended.

10. Filter device according to claim 9, wherein the actuating device (20) has a continuously closed contour (26) extending along the housing axis (90) and / or has webs (28) and / or pins (30) extending along the housing axis (90).

11. Filter device according to one of the preceding claims, wherein the actuating device (20) is formed as part of a central tube (40) and / or as part of an end plate (14, 16) of the filter element (10).

12. Housing section (50) for a filter device (100) according to one of the preceding claims, with at least one inlet (52) for a fluid to be filtered and at least one central outlet (54) for the filtered fluid, at least comprising a locking device (70) which is operatively connected to an actuating device (20) of a filter element (10) when a housing cover (56) is brought together as intended with the housing section (50), wherein the locking device (70) releases assembly of the housing cover (56) in a release position (72) and blocks assembly of the housing cover (56) in a lock position (74).

13. Filter element (10) for a filter device (100) according to one of claims 1 to 11, which is designed to be received in an interior of a housing cover (56) of the filter device (100), wherein the housing cover (56) with the filter element (10) is mountable on a housing section (50), at least comprising an actuating device (20) which, when the housing cover (56) is brought together as intended with the housing- section (50) is in operative connection with a locking device (70) arranged in the housing section (50).

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